The VirTool:Win32/DefenderTamperingRestore detection means that your computer has a problem. Allowing it to run may end up with some really bad consequences.
VirTool:Win32/DefenderTamperingRestore Detection Overview
VirTool:Win32/DefenderTamperingRestore is a detection name used by Microsoft Defender Antivirus to identify malicious software. This detection typically indicates the presence of a tool or program that attempts to tamper with or restore Microsoft Defender Antivirus settings or files.

Microsoft Defender: “VirTool:Win32/DefenderTamperingRestore”
In simple terms, VirTool:Win32/DefenderTamperingRestore is a warning that some app on your system is trying to modify or interfere with the settings, files, or components of Microsoft Defender. Programs associated with this detection may seek to make unauthorized changes to your antivirus software. Thus, they could disable or circumvent its protective features.
So, if you see this detection, scan your computer for malware and check your Defender settings to ensure they’re correct. However, if you still have detections, contact Microsoft support for help.
Threat Summary:
| Name | DefenderTamperingRestore VirTool |
| Detection | VirTool:Win32/DefenderTamperingRestore |
| Details | DefenderTamperingRestore is attached to another program (such as a document), which can replicate and spread after initial execution. |
Is It dangerous?
If you see a DefenderTamperingRestore detection, it is crucial to take immediate action to investigate the cause and ensure that your computer is secure. DefenderTamperingRestore is essentially a script that can bypass or disable Microsoft Defender, making it a security risk as it enables malware to infect a computer without detection. Usually, malware triggers it, but it can also be caused by legitimate software or a user accidentally changing the Defender settings. Therefore, staying vigilant and taking the necessary steps to protect your computer from potential security threats is essential.
Excellent article but this malware changes the whole operating system. May I call you for help? Thanks!
This isnt malware or a virus. This is a setting in one of your policy managers and its simple to fix if you are an admin. Its literally a check box.
Your first clue is that its a strange name for malware. Also if you click windows defenders link to online info on it, they say “This detection is for suboptimal configurations that may prevent Microsoft Defender Antivirus from functioning properly” and thats about it.